公开(公告)号：DE3729693A1

公开(公告)日：1988-05-05

申请号：DE3729693

申请日：1987-09-04

Applicant: SONY CORP

Inventor： UEDAIRA SATORU ,  SUZUKI MASAYUKI ,  SAMEJIMA YORIKO ,  TAMURA HIDEMASA ,  WATARI YUKIE ,  TANAKA EIJI

IPC: C01G49/00 ,  C04B35/26 ,  G11B5/706 ,  H01F1/11 ,  C01F11/00 ,  H01F10/20

Abstract: An aqueous solution containing Fe and Ba ions or a suspension containing the corresponding hydroxides is subjected, at ambient pressure in an alkaline solution of relatively high concentration, to a wet reaction and thus gives fine barium ferrite particles which are distinguished by their particle size distribution and their magnetic properties such as the coercive force or the magnetisation per unit weight. According to the invention, the aqueous solution or suspension contains not only Fe and Ba ions but use is likewise made of the starting material ions of elements lowering the coercive force or of elements increasing the coercive force, so as to thus be able to control the coercive force of the fine barium ferrite particles prepared, so that it is finally possible to prepare fine barium ferrite particles having a coercive force making them suitable for use in magnetic recording materials or as permanent magnets.

公开(公告)号：CA1212518A

公开(公告)日：1986-10-14

申请号：CA457243

申请日：1984-06-22

Applicant: SONY CORP

Inventor： UEDAIRA SATORU ,  YAMANOI HIROSHI ,  SUZUKI MASAYUKI ,  TAMURA HIDEMASA ,  SUZUKI HIROYUKI

IPC: C01G25/00 ,  H01B3/12 ,  C01G25/02

Abstract: TITLE OF THE INVENTION METHOD FOR MANUFACTURING FINE POWDER OF SrZrO3 A method for manufacturing fine powder of SrZrO3 is described in which a hydrolyzate of a Zr compound and an Sr compound are reacted with each other in a strongly alkaline aqueous solution to obtain fine powder of SrZrO3.

公开(公告)号：CA1199771A

公开(公告)日：1986-01-28

申请号：CA390238

申请日：1981-11-17

Applicant: SONY CORP

Inventor： UEDAIRA SATORU ,  SHIMIZU HIDETOSHI ,  TAMURA HIDEMASA ,  TAGUCHI HIROMICHI ,  YAMANOI HIROSHI ,  MAKINO YOSHIMI

IPC: G11B15/61 ,  B29C70/64 ,  C08J5/16 ,  C08K3/00 ,  C08L67/06 ,  F16C33/20 ,  G11B15/60

Abstract: The slide member is composed of a polymer composite material containing an unsaturated polyester resin, a thermoplastic resin and a granular inorganic filler. The slide member is of a double construction the surface of which is removed so as to expose part of the surface of the inorganic filler. The slide member thus constructed has particularly a favorable tape travelling property because it has a low friction coefficient, as well as the favorable properties inherent in the polymer composite material.

公开(公告)号：GB2115313A

公开(公告)日：1983-09-07

申请号：GB8301238

申请日：1983-01-18

Applicant: SONY CORP

Inventor： ISHIKAWA REIJI ,  SAITO MASAKI ,  MORI TOSHIO ,  TAMURA HIDEMASA

IPC: C03C17/00 ,  G02B26/02 ,  B05D5/00 ,  C03C17/42

Abstract: A method for manufacturing rotary ball display devices wherein a plurality of such balls are provided with a coating of a color different from the remainder of the ball, the ball members are coated with a thin coating insoluble in the settling medium into which they are introduced, so that upon settling into a low viscosity liquid, they form a uniform layer. A high molecular weight hardenable coating material which is soluble in the low viscosity liquid is then poured onto the coated ball members to cover the layer. Then, the low viscosity liquid is removed and the hardenable coating material is caused to harden. The thin coating is then dissolved away from portions of the ball members to leave cavity portions thereabout into which a high resistivity liquid is introduced. The resulting ball members have a refractive index on the colored layer which is substantially the same as the refractive index of the high resistivity liquid contained in the cavities.

公开(公告)号：DE2361131A1

公开(公告)日：1974-06-12

申请号：DE2361131

申请日：1973-12-07

Applicant: SONY CORP

Inventor： YANAGISAWA YUZURU ,  TAMURA HIDEMASA

IPC: C23C14/04 ,  H01L41/00 ,  H03H3/02 ,  H03H9/13 ,  H03H9/02

Abstract: A resonator comprising a single crystal plate of lithium tantalate, lithium niobate or the like is provided having electrodes formed on the plate, the electrodes being multiple layers including gold, chromium, copper and chromium. A novel method of forming such a resonator is also disclosed.

公开(公告)号：DE1800649A1

公开(公告)日：1969-08-07

申请号：DE1800649

申请日：1968-10-02

Applicant: SONY KABUSHIKIKAISHA SONY CORP

Inventor： KODERA YOICHI ,  KIKUCHI ATSUSHI ,  KITAMURA TOMOSABURO ,  TAMURA HIDEMASA

IPC: C04B35/46 ,  C04B35/48 ,  C04B35/50 ,  C04B35/51 ,  H01G7/02 ,  H01L41/18 ,  H01L41/187

公开(公告)号：DE3575711D1

公开(公告)日：1990-03-08

申请号：DE3575711

申请日：1985-10-10

Applicant: SONY CORP

Inventor： YAMAGUCHI TAKASHI ,  NAGASAWA NAOMI ,  TAMURA HIDEMASA

IPC: C04B35/00 ,  C04B35/495 ,  G11B5/147 ,  G11B5/31

Abstract: A ceramic composition particularly useful for use in thin film magnetic heads, the composition having the general formula:wherein the ratio x/y is at least 0.74 but less than 1.00, the composition having a coefficient of thermal expansion closely matching that of the magnetic alloy film with which it is used so as to prevent separation of the two upon changes in temperature.

公开(公告)号：CA1201575A

公开(公告)日：1986-03-11

申请号：CA435193

申请日：1983-08-23

Applicant: SONY CORP

Inventor： UEDAIRA SATORU ,  YAMANOI HIROSHI ,  TAMURA HIDEMASA

IPC: C01G23/00 ,  C01F11/02 ,  C01F1/00 ,  C01G23/04

Abstract: A method of manufacturing metal titanate fine powder which is represented as MTiO3 wherein M is one of Ba, Sr and Ca is disclosed which includes the steps of preparing hydrolyzed compound of titanium compound and reacting the hydrolyzed compound of titanium compound with water soluble metal salt of one of Ba, Sr and Ca in an aqueous alkaline solution having pH not less than 13 .

公开(公告)号：FR2561263A1

公开(公告)日：1985-09-20

申请号：FR8419822

申请日：1984-12-26

Applicant: SONY CORP

Inventor： ASO KOICHI ,  UEDAIRA SATORU ,  ITO SHIGEYASU ,  TAMURA HIDEMASA ,  MAKINO YOSHIMI

IPC: C22C45/02 ,  G11B5/127 ,  H01F1/153 ,  C22C38/24

Abstract: a. Amorphous magnetic alloy. b. Characterised in that it comprises 2 to 20 % of ruthenium atoms or of ruthenium atoms and chromium, molybdenum, vanadium, aluminium or manganese atoms, the total of the ruthenium and chromium, molybdenum, vanadium, aluminium or manganese atoms representing between 2 and 20 % of alloy, 10 to 30 atomic % of atoms of at least one element capable of forming an amorphous structure, chosen from phosphorus, carbon, silicon, boron and germanium from 0 to 20 atomic % of cobalt and/or nickel. c. Alloy applicable to the manufacture of magnets for tape recorders and video recorders.

公开(公告)号：CA1190362A

公开(公告)日：1985-07-16

申请号：CA419479

申请日：1983-01-14

Applicant: SONY CORP

Inventor： ISHIKAWA REIJI ,  SAITO MASAKI ,  MORI TOSHIO ,  TAMURA HIDEMASA

IPC: C03C17/00 ,  G02B26/02 ,  G09G3/00

Abstract: . A method for manufacturing rotary ball display devices wherein a plurality of such balls are provided with a coating of a color different from the remainder of the ball, the ball members are coated with a thin coating insoluble in the settling medium into which they are introduced, so that upon settling into a low viscosity liquid, they form a uniform layer. A high molecular weight hardenable coating material which is soluble in the low viscosity liquid is then poured onto the coated ball members to cover the layer. Then, the low viscosity liquid is removed and the hardenable coating material is caused to harden. The thin coating is then dissolved away from portions of the ball members to leave cavity portions thereabout into which a high resistivity liquid is introduced. The resulting ball members have a refractive index on the colored layer which is substantially the same as the refractive index of the high resistivity liquid contained in the cavities.